Now that qt_add_executable doesn't set the WIN32_EXECUTABLE and
MACOSX_BUNDLE properties anymore, pro2cmake needs to look at the qmake
example projects and generate appropriate set_target_properties calls.
The relevant CONFIG entries to look at are windows, console,
app_bundle and cmdline.
CONFIG += windows implies 'subsystem windows' on Windows, which maps
to WIN32_EXECUTABLE == TRUE.
CONFIG += console implies 'subsystem console' on Windows, which maps
to WIN32_EXECUTABLE == FALSE. Aka the opposite of CONFIG += windows.
Whichever is the last one set, cancels out the other one.
CONFIG += app_bundle implies a macOS bundle executable, which maps
to MACOSX_BUNDLE == TRUE.
CONFIG += cmdline is the same as CONFIG += console and CONFIG -=
app_bundle, aka WIN32_EXECUTABLE and MACOSX_BUNDLE set to false.
In qmake, if no CONFIG is specified in an example project,
the default is CONFIG += windows app_bundle, aka WIN32_EXECUTABLE
and MACOSX_BUNDLE set to true.
The script uses a heuristic to try and not write the properties for
every single subscope, except for values different from the default.
This is not strictly correct, but it covers most use cases, and keeps
the generated projects a bit cleaner.
Task-number: QTBUG-87664
Task-number: QTBUG-86827
Change-Id: If05606ec3205e0fe7c1803c07e114d9fd9c3e4f7
Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>
65fe5b2ce2